How often should I change the engine air filter on my Hyundai Sonata?

The replacement interval of the engine air filter for your Hyundai Sonata isn't strictly fixed. Generally, it's recommended to replace it every 15,000 to 30,000 kilometers or once a year. However, this may vary depending on your driving conditions. If you often drive in dusty areas, such as construction sites or regions with a lot of sand and dust, you might need to replace it more frequently, perhaps every 10,000 kilometers. In a relatively clean urban environment, the replacement interval could be extended to 20,000 kilometers. When the air filter gets dirty, it restricts the air flow into the engine, making the engine work harder, reducing fuel efficiency, and potentially affecting performance. It's a good habit to check the air filter during regular maintenance. If it looks extremely dirty or clogged, it's time to replace it.